The match() method of java.util.Scanner class returns the match result of the last scanning operation performed by this scanner.
Syntax:
Java
Java
public MatchResult match()Return Value: This function returns a match result for the last match operation. Exceptions: The function throws IllegalStateException if no match has been performed, or if the last match was not successful. Below programs illustrate the above function: Program 1:
// Java program to illustrate the
// match() method of Scanner class in Java
// without parameter
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
String s = "GFG Geeks!";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
// check if next token is "GFG"
System.out.println("" + scanner.hasNext("GFG"));
// find the last match and print it
System.out.println("" + scanner.match());
// print the line
System.out.println("" + scanner.nextLine());
// close the scanner
scanner.close();
}
}
Output:
Program 2: To demonstrate IllegalStateException
true java.util.regex.Matcher[pattern=GFG region=0, 10 lastmatch=GFG] GFG Geeks!
// Java program to illustrate the
// match() method of Scanner class in Java
// without parameter
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
String s = "GFG Geeks!";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
// check if next token is "gopal"
System.out.println("" + scanner.hasNext("gopal"));
// find the last match and print it
System.out.println("" + scanner.match());
// print the line
System.out.println("" + scanner.nextLine());
// close the scanner
scanner.close();
}
catch (IllegalStateException e) {
System.out.println("Exception caught is: " + e);
}
}
}
Output:
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#match()false Exception caught is: java.lang.IllegalStateException: No match result available